ron burke has been developing it glix-13. >> we found it has a very nice antidepressant effect lasts for several days after a single dose, and with no side effects will of schizophrenia at all. >> reporter: in one study, patients taking an experimental drug had a 40% improvement in symptoms compared to 24% on placebo. jim staples participated in the trial. >> my hope is that the trial drug will in time be the last one i'll ever have to take. i take the drug for the rest of my life, but it might be the last one i have to switch to. >> reporter: the drugs are still in trial and even if they continue to show promise f.d.a. approval is still three to five years away. >> pelley: thankses, doc. president obama conditions a christmas tradition begun by calvin coolidge when we continue. um become "i can"? talk to your doctor. orencia reduces many ra symptoms like pain, morning stiffness and progression of joint damage. it's helped new ra patients and those not helped enough by other treatments. do not take orencia with another biologic medicine for ra due to an increased risk of serious infe